Head-rest



(No Model.)

L. P. KNOLL.

- HEAD'REST.

No. 419,961. Patented 121,111.21, 1890.

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UNITED STATES.

PATE T OFFICE.

LOUIS PHILIPP KNOLL, OF MONTROSE, PENNSYLVANIA. f

' HEAD- REST.

, SPECIFICATION forming part of Letters Patent No. 419,961, datedJanuary 21, 1890.

Application filed August 27,1889. Serial No. 322,092. (No model.)

To all whom it may concern:-

Be it known that I, LOUIS PHILIPP KNOLL, a citizen of the United States,residing at Montrose, in the county of Susquehanna and State ofPennsylvania, have invented certain new and useful Improvements inHead-Rests for Barbers and Dentists Chairs, of which the following is afull and clear description, reference being had to the accompanyingdrawings, making part of this specification, in which Figure 1represents a perspective view of my new head-rest with a portion of theside detached to expose the spring. Fig. 2 is a cross-section on theline X X of Fig. 1. Fig. 3 represents the inside of the bottom platewith the spring removed. Fig. 4 shows the rest when used solid.

To enable others skilled in the art to make and use my invention, I willproceed to describe the exact manner in which I have carried it out.

The object of my present invention is to furnish an elastic head-restfor barbers and dentists chairs which will permit the head of theoccupant to roll in any direction, or be solid when desired by theoperator; and it consists in the combination and arrangement of theseveral devices hereinafter described and claimed.

The body of my head-rest consists of two plates A and B, constructed ofmetal or other suitable material and of suitable dimensions for the headof the person occupying the chair to conveniently and comfortably restupon it. Between these two plates and at or near their center I placethe coil-spring O, the diameter of which is nearly equal to the width ofthe plates. In each of these plates,

immediately above and below the spring, is a groove D, and within thesegrooves are placed the end coils of the spring, the spring being held inposition by the grooves inwhich they rest, and the flexible material Fconnecting the two parts together. It is evident from this descriptionof my improved elastic headrest, the coil-spring being placed centrallybetween the two main plates, that the rest will roll or rock in any andall required directions to suit the convenience of the operator. Isocure all around the rest a strip of some suitable fabric F,which willreadily yield to pressure on the rest and at the same time control andlimit the action of the spring.

To render the elastic rest readily convertible into a solid rest, asfrequently required by dentists, I place a hook at on each end of one ofthe plates and the eye I) on each end of the opposite plate, so that bysimply pressing the plates together and attaching the hooks to the eyesthe rest is rendered solid.

My new head-rest may be attached to the chair by any convenient and wellknown means, so as to be quickly raised or lowered.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In an elastic head-rest, the groovedplates A and B, in combination withthe centrallylocated coiled spring 0, the flexible fabric F, the hooks aon the ends of one plate, and eyes I) on the ends of the opposite plate,all constructed and combined substantially as and for the purpose hereinset forth.

LOUIS PHILIPP KNOLL.

WVitnesses:

W. H. WARNER, M. LA GRANGE GRIFFIs.

